gnucash-on-windows master: Use mingw swig rather than msys swig

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/56bb8402 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/ad97c2d9 (commit)



commit 56bb84025ea4bd89252e0559493b0529adbb923b
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Oct 2 10:14:58 2020 +0200

    Use mingw swig rather than msys swig
    
    The mingw variant returns the result we need for -swiglib.
    And with that our hack can now be removed.



Summary of changes:
 gnucash.modules        |  6 +++---
 patches/FindSWIG.patch | 12 ------------
 setup-mingw64.ps1      |  8 ++------
 3 files changed, 5 insertions(+), 21 deletions(-)
 delete mode 100644 patches/FindSWIG.patch